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ycow [4]
4 years ago
7

Calculate the number of nitrogen atoms in 20.9 grams of nitrogen.

Chemistry
1 answer:
SVETLANKA909090 [29]4 years ago
8 0

Answer:

N=5.47×10^23

Explanation:

n=

n = \frac{m }{ar}

N=n×la

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nordsb [41]

Answer:

-304.1

I had this question and that’s what I got

6 0
3 years ago
An element with 7 valence electrons would be a
Sunny_sXe [5.5K]

Answer:

The Group 7A elements have seven valence electrons in their highest-energy orbitals (ns2np5). This is one electron away from having a full octet of eight electrons, so these elements tend to form anions having -1 charges, known as halides: fluoride, F-; chloride, Cl-, bromide, Br-, and iodide, I-.

...

Group 7A — The Halogens.

(7)

(8)

(9)

(10)

Explanation:

here is your answer hope you will enjoy and mark me as brainlist

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6 0
2 years ago
Surfers put wax on their boards to reduce friction between the
Advocard [28]

Answer:

ESurfboard wax (also known as surfwax) is a bodyboard, or skimboard, to keep the surfer from slipping off the board when paddling out or riding a wave. It is also used to increase grip on the paddle of a dragon boat or surf board.

idk if that is what your looking for.

5 0
3 years ago
Using the phase diagram for water, what phase is water at 0.01 degrees Celsius and 0.0060 atmospheres?
anzhelika [568]
<span>Answer: at 0.01 °C and 0.0060 atm the three phases (solid, liquid and gas)
</span><span>
</span><span>
</span><span>Explanation:
</span><span>
</span><span>
</span><span>1) Water at 0.0060 atm and 0.01° C is at its triple point.
</span>

2) The triple point is the point in the phase diagram at which the three physical states coexist: gas, liquid and solid.

3) That means that water can freeze and boil at the same time. In fact they can happen any of the six changes of phase: freezing (liquid to solid), melting (solid to liquid), evaporation (liquid to gas), condensation (gas to liquid), sublimation (solid to gas), and deposition (gas to solid).

The phase diagram is unique for any substance, meaning that it is different for different substances: the normal boiling and melting points are different.
8 0
4 years ago
A possible problem with the roaches in the metabolic rate experiments was that they were stressed, and hyperventilating and exha
andre [41]

Answer:

It would be higher than expected.

Explanation:

Respiration quotient (RQ) may be defined as the quantity used for the representation of the basal metabolic rate. This mainly depends on the amount of the carbon dioxide.

The respiratory quotient represents the ratio of carbon dioxide eliminated with the amount of the oxygen consumed. During stress condition, the oxygen consumption of our body increase and more carbon dioxide is exhale out from the body. This will increase the RQ.

Thus, the answer is RQ will be higher than expected.

7 0
3 years ago
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